Unity 判斷鼠標是否在Ui上

public class Utility
{
 /// <summary>
    /// 判斷點擊的位置是否在UI上
    /// </summary>
    /// <returns>true:當前點擊在UI上  false:當前不點擊在UI上</returns>
    public static bool IsPointerOverUIObject()
    {
        PointerEventData eventDataCurrentPosition = new PointerEventData(EventSystem.current);
#if !UNITY_EDITOR && (UNITY_ANDROID || UNITY_IPHONE)
        eventDataCurrentPosition.position = Input.GetTouch(0).position;
#else
        eventDataCurrentPosition.position = new Vector2(Input.mousePosition.x, Input.mousePosition.y);
#endif

        List<RaycastResult> results = new List<RaycastResult>();
        if (EventSystem.current)
        {
            EventSystem.current.RaycastAll(eventDataCurrentPosition, results);
        }

        for (int i = 0; i < results.Count; i++)
        {
            if (results[i].gameObject.layer == LayerMask.NameToLayer("UI")
                )
                return true;
        }

        return false;
    }
}